Stabilization of insecticide materials



Patented Dec. 30, 1941 STABILIZATION F INSECTICIDE MATERIALS William P. ter Horst, Packanack Lake, N. 5., as-

signor to United States Rubber Company, New York, N. Y., a corporation 01' New Jersey No Drawing. Application April 14, 1939, Serial No. 267,920

Claims. (or. 1167-24) This invention relates to stabilization of insecticide materials.

It is known that insecticide materials such as are commonly known as derris powder, which is made by grinding derris root (Derrz's elliptica). rapidly deteriorate when exposed to sun and/or light. The deterioration is accompanied by a. corresponding loss in insecticidal powder which makes it necessary for one to spray or dust at frequent intervals. The same is true for other insecticidal materials such as, rotenone, timbo root (Lonchocarpus urucu), cube root (Lonchocarpus utilis), ground pyrethrum flowers, and others. This deterioration also takes place when extracts of these roots are used instead of the ground roots, and the stabilizers described herein may be used in conjunction with derris resins or with derris extracts.

It has been found that aryl-sulfonylamino diarylamines having the general formula RlNH-R2NH-SO2R, where R and R1 represent aryl groups, and R: an arylene group, are useful in preventing the deterioration of insecticide material.

Particularly effective for the purpose are: p-(p-toluene sulfonyl amino) diphenylamine di-(p-toluene sulfonyl) -p-phenylene diamine CHPOSOrNHGNILSOOCH:

p-(para-toluenesulfonamino) -phenyl para-tolylamine The tests described below illustrate the usefulness of these stabilizers:

In Test I, which is the control experiment, un-

treated derris powder containing 5% of rotenone 5% di-(p-toluene sulfonyl) p-phenylene diamine was used.

In Test IV, a similar derris powder, containing 5% p-(p-toluene sulionylamino) diphenylamine will greatly prolong the repellent action of derris (Aphis rumicis) were used on nasturtiums as the host. The samples were thoroughly mixed at frequent intervals during the exposure period. The insecticides were used in the form of water dispersions containing one pound insecticide per 200 gals. of water.

The plants were sprayed on a turntable, making 15 revolutions per minute. The time of spraying was 30 seconds (15 seconds up, 15 seconds down),

and the pressure was 25 lbs/sq. in. The mortality was determined 24 hours after spraying.

a Table I Total num- Percent dead Chemical ber of at end of 24 insects hours Den-is containing 5% rotenonc (untreated and unexposed) 682 54, 3 Denis containing 6% rotenone (untreated and exposed 36 hours to a mercury vapor sunlamp l, 066 38. 9 Check; untreated plants 480 4. i Derris containing 5% rotenone to which was added 5% p-(p-toluene sulionylamino) diphenylnmine exposed 36 hours under sunlamp 601 55. 9 Dorris containing 5% rotenone to which has been added 6%, di-(ptoluene aulionyl) pphenylene diamine exposed 36 hours under aunlam 537 62.9 Denis containing 5% rotenone to whicirhas been added 5% p-(paratoluenesulionsmino) phenyl puetolylamine exposed 36 hours under eunlamp 834 57.3

in the field.

The concentration of the stabilizers .;may be more or less than 5%. In preparing the stabilized powder the stabilizer is preferably added prior to or during the grinding of the derris root or the like, although it may instead be added after the grinding. The so-stabilized insecticides may be used in the form of a dust or as a spray with or without the addition of suitable auxiliary ingreclients such as wetting agents, spreading agents, sticking agents, etc. Mixtures of these stabilized was used. As test organisms, black bean aphids 56 insecticides with other insecticides, insect repeilents, or with fungicides fall within the scope of the invention.

Having thus described my invention. what I claim and desire to protect by Letters Patent is:

1. An insecticide preparation comprising an insecticide from the class consisting of derris root, rotenone, timbo root, cube root, and pyrethrum flowers, and as a stabilizer therefor an acidylamino diarylamine having the general iormula Rl-NH-RI-NH-SOQ-R, where R and R1 represent aryl groups and R: an arylene group.

2. An insecticide preparation comprising an insecticide from the class consisting of derris root, rotenone, timbo root, cube root, and pyrethrum flowers, and as a stabilizer therefor p-(p-toluene sulfonylamino) diphenylamine.

3. An insecticide preparation comprising an insecticide from the class consisting of derris root,

rotenone, timbo root, cube root, and pyrethrum flowers, and as a stabilizer therefor di-(p-toluene sultonyl) p-phenylene diamine.

4. An insecticide preparation comprising aninsecticide from the class consisting of derris root, rotenone, timbo root, cube root, and pyrethrum flowers, and as a stabilizer therefor p-(paratoluenesulionamino) -pheny1 para-tolylamine.

5. An insecticide preparation comprising an insecticide from the class consisting of derris root, rotenone, timbo root, cube root, and pyrethrum flowers. and as a stabilizer therefor an acidylamino diarylamine having the general formula R1NH-R2--NHSO2R, where R. and R1 represent aryl groups of the benzene series and R: an arylene group of the benzene series.

WILLIAM P. 'rsa HORST. 

